Install Redi Shade window shades yourself in seconds using the simple stick installation. Simply peel the shade liner,then press to adhere the shade to your window. Original Arch Shades are designed to be installed an inside mount and are designed to fit a perfect round circle. First check that the base of your window is a minimum depth of 1.5 to support the Arch Shade. Next measure both the inside center height of the arched window, as well as the base of the window frame. The height or radius can be found by measuring from the base midpoint (or center) to the highest point of the arch. To get the width or diameter, measure inside left to inside right of the window frame. Place the shade into the arch holder, then into your window frame. Fan the Original Arch Shade open and position in the window, then stick the shade inside your window frame. Using both hands, press firmly along the bottom pleats. All Redi Shade window shades include cordless operation as a standard feature to ensure they always provide maximum safety, ease of use, and a clean, cord-free appearance.